53299991 has 2 divisors, whose sum is σ = 53299992. Its totient is φ = 53299990.

The previous prime is 53299973. The next prime is 53300003. The reversal of 53299991 is 19999235.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53299991 - 2¹⁰ = 53298967 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53299931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26649995 + 26649996.

It is an arithmetic number, because the mean of its divisors is an integer number (26649996).

Almost surely, 2^53299991 is an apocalyptic number.

53299991 is a deficient number, since it is larger than the sum of its proper divisors (1).

53299991 is an equidigital number, since it uses as much as digits as its factorization.

53299991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 196830, while the sum is 47.

The square root of 53299991 is about 7300.6842829970. The cubic root of 53299991 is about 376.3359543581.

The spelling of 53299991 in words is "fifty-three million, two hundred ninety-nine thousand, nine hundred ninety-one".